# Cool

Canonical URL: https://colorcurio.us/colormaps/vispy.cool
Source type: Colormap
Type: sequential
Collection: vispy
Attribution: vispy 0.x, vispy/color/colormap.py
License: BSD-3-Clause
Source: https://vispy.org/api/vispy.color.colormap.html
Tags: MATLAB-derived, cyan-magenta, saturated
Stops: 256

## Summary

Cool is a sequential colormap from the vispy collection. Inspect its perceptual lightness, chroma, and hue profile on colorcurio.us.

vispy preset 'cool' (cyan→magenta).

## Perceptual profile (OKLCh)

- Lightness: 0.905 → 0.702 (range 0.204, min 0.702, max 0.905); monotonic; midpoint 0.804
- Chroma: min 0.081, max 0.323, mean 0.161
- Hue: 194.8° → 328.4° (span 133.6°), path monotonic-cw; quadrants: cyan, azure, blue, violet, magenta
- Endpoint temperature: cool → cool
- Perceptual ΔE: total 69.6, mean/step 0.273, max step 0.453, smoothness 0.637, speed 0.273

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 41.1; preserves order: yes
- Deuteranopia: ΔE total 21.7; preserves order: yes
- Tritanopia: ΔE total 77.2; preserves order: yes

## Related

- Family: https://colorcurio.us/colormaps/families/vispy
- All colormaps: https://colorcurio.us/colormaps